RIT on Geometry and Physics Archives for Fall 2024 to Spring 2025
Origins of Mirror Symmetry from Superfields
When: Thu, August 31, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Jim Gates (UMd Physics) -
Introduction to 3D Mirror Symmetry
When: Thu, September 7, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Richard Wentworth (UMd Math) -
A physicist's view of 3D mirror symmetry
When: Thu, September 14, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Konstantinos Koutrolikos (UMd Physics) -
Abstract: See Mirror Symmetry in Three Dimensional Gauge Theories, Phys. Lett. B 387 (1996) 513-519, arXiv:hep-th/9607207.
3D mirror symmetry from brane dynamics
When: Thu, September 21, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Jonathan Rosenberg (UMd Math) -
Abstract: I'll try to discuss some of the background to the paper of Hanany and Witten, arXiv:hep-th/9611230
A gentle introduction to hyperkähler manifolds
When: Thu, September 28, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Henry Denson (UMd Math) -
Abstract: This will be an elementary introduction to some of the spaces that will come up in the study of 3D mirror symmetry
Hyperkähler manifolds and Kronheimer's construction
When: Thu, October 5, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Sze Hong Kwong (UMd Math) -
Abstract: This will be an elementary introduction to some of the spaces that will come up in the study of 3D mirror symmetry
Hyperkähler manifolds and Kronheimer's construction (cont'd)
When: Thu, October 12, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Sze Hong Kwong (UMd Math) -
Abstract: This will be an elementary introduction to some of the spaces that will come up in the study of 3D mirror symmetry
replaced by Jim Gates' Inclusive Excellence Lecture
When: Thu, October 19, 2023 - 3:30pmWhere:
postponed till next week because of Norbert Wiener colloquium
When: Thu, October 26, 2023 - 3:30pmWhere:
More on the Webster-Yoo survey
When: Thu, November 2, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Henry Denson (UMd Math) -
Abstract: see article by Webster and Yoo in the AMS Notices
3D Mirror symmetry from brane dynamics, following Hanany and Witten (cont'd)
When: Thu, November 9, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Jonathan Rosenberg (UMd Math) -
Abstract: See Amihay Hanany and Edward Witten. Type IIB superstrings, BPS monopoles, and three-dimensional gauge dynamics, Nucl. Phys. B 492 (1997), no. 1-2, 152–190, arXiv:hep-th/9611230.
Guest Lecture: Classification of disordered insulators in 1D
When: Thu, November 16, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Jacob Shapiro (Princeton Math) -
Abstract: In this talk I will describe some of the mathematical aspects of disordered topological insulators. These are novel materials which insulate in their bulk but (may) conduct along their edge; the quintessential example is that of the integer quantum Hall effect. What characterizes these materials is the existence of a topological index, experimentally measurable and macroscopically quantized. Mathematically this is explained by applying algebraic topology to the space of appropriate quantum mechanical Hamiltonians; I will survey some recent results mainly concentrating on the classification problem in one dimension, where the problem reduces to studying spaces of unitaries (resp. orthogonal projections) which essentially-commute with a fixed projection.
Coulomb branches as affine varieties
When: Thu, November 30, 2023 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Yong Cui (UMd Math) -
Abstract: This talk will be about the paper of Nakajima et al.,
arXiv:1601.03586.
organizational meeting for the spring semester postponed till next week
When: Thu, January 25, 2024 - 3:30pmWhere: postponed till next week
organizational meeting for the spring semester
When: Thu, February 1, 2024 - 3:30pmWhere: MTH 1313
An introduction to spectral networks
When: Thu, February 8, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Richard Wentworth (UMd)
not meeting this week
When: Thu, February 15, 2024 - 3:30pmWhere:
An introduction to spectral networks (cont'd)
When: Thu, February 22, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Richard Wentworth (UMd)
not meeting this week
When: Thu, February 29, 2024 - 3:30pmWhere:
Speaker: not meeting because of Algebra/Number Theory lecture
Dilogarithms, SL(2,C) Chern-Simons theory, and hyperbolic volumes
When: Mon, March 4, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Christian Zickert (UMCP) -
Exact WKB and the Stokes phenomenon
When: Thu, March 7, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Kwong Sze Hong (UMd)
Abstract: This talk will be based on:
(1) the monograph "Algebraic Analysis of Singular Perturbation Theory" by T. Kawai and Y. Takei, and (2) the article "WKB analysis and Stokes geometry of differential equations" by Y. Takei.
Exact WKB and the Stokes phenomenon (cont.)
When: Thu, March 14, 2024 - 3:30pmWhere: Kirwan Hall 1310
Speaker: Sze-Hong Kwong (UMCP) -
On quadratic differentials and stability conditions
When: Thu, March 28, 2024 - 3:30pmWhere: Kirwan Hall 1310
Speaker: Amin Gholampour (University of Maryland) -
Dilogarithms, SL(2,C) Chern-Simons theory, and hyperbolic volumes
When: Thu, April 4, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Christian Zickert (UMCP) -
Dilogarithms, SL(2,C) Chern-Simons theory, and hyperbolic volumes (cont.)
When: Thu, April 11, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Christian Zickert (UMCP) -
BPS State and Counting from Spectral Network
When: Thu, April 25, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Lutian Zhao (UMCP) -
Abstract: BPS states appear very frequently in geometric applications of quantum field theory.This talk aims to explain BPS states, especially the case of BPS states in N = (2, 2) supersymmetric field theories in two dimensions, and how spectral networks count the BPS indices.
BPS Counting from Spectral Network for Landau-Ginzburg Model
When: Thu, May 2, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Lutian Zhao (UMCP) -
Abstract: In this talk, I will introduce the spectral network for Landau-Ginzburg Model. The good thing about LG model is that the supersymmetric ground states of this model are given by critical points of the potential functions. When connecting two ground states one may explicitly write down the BPS solitons, and the BPS indices for these solitons will correspond to the intersection numbers of vanishing cycles. In this talk, I will try to explain these correspondences and as a result, how the use of spectral network explains the Picard-Lefschetz for these vanishing cycles.
BPS Counting from Spectral Network, II
When: Thu, May 9, 2024 - 3:30pmWhere: Kirwan Hall 1313
Speaker: Lutian Zhao (UMCP) -
Abstract: In this talk, I will continue the introduction of spectral networks for 2D theory, namely, how spectral networks help recover the wall-crossing formula for BPS soliton for Landau-Ginzburg theory. I will explain how BPS solitons recover the tt* geometry and then, how the Hitchin equation and Higgs bundle show up in this picture.